CN102646512A - Novel three-port dual-adjustable capacitor and manufacture method thereof - Google Patents
Novel three-port dual-adjustable capacitor and manufacture method thereof Download PDFInfo
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- CN102646512A CN102646512A CN2011100078784A CN201110007878A CN102646512A CN 102646512 A CN102646512 A CN 102646512A CN 2011100078784 A CN2011100078784 A CN 2011100078784A CN 201110007878 A CN201110007878 A CN 201110007878A CN 102646512 A CN102646512 A CN 102646512A
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Abstract
The invention discloses a novel three-port dual-adjustable capacitor and a manufacture method thereof, wherein the novel three-port dual-adjustable capacitor comprises a movable sheet part, a static sheet part and a dielectric layer, wherein two capacitors are respectively formed on the static sheet part and the movable sheet part and share a common port, non-common ports and the common port of the two capacitors form a three-port device; the dielectric layer is arranged between the static sheet part and the movable sheet part, the two capacitors are adjustable simultaneously, and values of the two capacitors equivalently change in opposite directions; the static sheet part comprises a plurality of static sheet layers, each static sheet layer comprises two corresponding static sheets which are positioned in the same plane; and the movable sheet part comprises a screw and a plurality of movable sheets, the screw is arranged on the center of the static sheet part and rotates through driving the movable sheets for changing the values of the two capacitors. Compared with the prior art, the novel three-port dual-adjustable capacitor and the manufacture method thereof have the advantages of being simple in structure, consuming less materials, being easy in processing and being free of debugging.
Description
Technical field
The present invention relates to tunable capacitor, two tunable capacitors of particularly a kind of novel three ports and manufacturing approach thereof.
Background technology
The PVC electric capacity that tradition is used for broadcast receiver generally uses tetrad PVC.Fig. 1 has provided the front elevation of tetrad PVC, and Fig. 2 has provided the back view of tetrad PVC.This PVC has five ports, is respectively 1,2,3,4 and G.1,2,3,4 four ports and G port constitute four big tunable capacitors respectively.
1,2 and G port two big tunable capacitor C1, C2 the constituting local oscillator when being used for the broadcast reception of frequency modulation (FM) standard tuning tuning with antenna; Local oscillator when 3,4 two big tunable capacitor C3, C4 constituting with the G port are used for the broadcast reception of amplitude modulation (AM) standard is tuning tuning with antenna.The maximum rotatable 180deg of screw rod in the middle of the front elevation shown in Figure 1, interlock will take place and change in the big capacitor C of during the screw rod rotation between 1,2,3,4 four port and the G four 1, C2, C3, C4, thereby with broadcast receiver be tuned on the different frequency.
Constitute except 1,2,3,4 ports and G port four big capacitor C 1, C2, C3, the C4, this PVC the inside also comprises four little electric capacity, respectively with four big electric capacity parallel connections.From back view shown in Figure 2, can see four little screw rods, the maximum rotatable 360deg of these four small screws controls four little electric capacity respectively.The effect of little electric capacity has two: the high-end and low side of coverage broadcast platform just in time when 1) guaranteeing big electric capacity rotation; 2) guarantee to be responsible for the tuning electric capacity of antenna and catch up with the responsible tuning electric capacity of local oscillator.Little electric capacity is only transferred once in the broadcast receiver manufacture process, listens to when using in that broadcast receiver is actual, and channel selection changes four big electric capacity through rotary screw and realizes.
A basic electric capacity is made up of two flat plate and middle medium, wherein two ports of two flat plate formation electric capacity.Electric capacity is adjustable, so a port connects stator, and another port double-action plate.Like Fig. 3 and Fig. 4, be example with 1 port one 10,1 port one 10 of electric capacity connects a fan-shaped stator 101, and the G port one 20 of electric capacity links to each other with fan-shaped moving plate 103 through screw rod 102.When screw rod 102 rotations, moving plate 103 rotations, the overlapping area of moving plate 103 and stator 101 changes, thereby electric capacity is changed.When actual PVC made, each big electric capacity was by a stator, two moving plates; Two layer medium constitutes, and two moving plates are two-layer up and down, stator layer that is clipped in the middle; Be dielectric layer between each moving plate and the stator, two moving plates are all linked on the screw rod, and two moving plates rotate together during the screw rod rotation.By that analogy, above-mentioned four big electric capacity all are that same principle changes electric capacity.
This PVC has several problems:
1) PVC comprises four big electric capacity, and each big electric capacity is by two moving plates, a stator, and two dielectric layers constitute; Four big electric capacity just need eight moving plates, four stators, eight dielectric layers; This in addition PVC also comprises four little electric capacity, and this obviously PVC materials are many, processes loaded down with trivial details;
2) four electric capacity are arranged among this PVC, wherein to be responsible for antenna under the frequency modulation standard tuning tuning with local oscillator for C1 and C2, and when C2 changed, C1 will follow the C2 variation according to certain relation; In like manner to be responsible for antenna under the amplitude modulation standard tuning tuning with local oscillator for C3 and C4, and when C4 changed, C3 also will change with C4 according to certain relation.Debugging link that how this fixing relation has made PVC processing.
3) in addition, during the traditional broadcast receiver chip of this type of PVC collocation, also need make link at broadcast receiver increases manual debugging, guarantees through the little electric capacity of manual debugging that big electric capacity rotates to and covers wireless frequency range when minimum and maximum.
Fig. 5 is the sketch map that traditional broadcast receiver chip uses conventional P VC, has only shown four pins (input of FM antenna, the input of FM local oscillator, the input of AM antenna, the input of AM local oscillator) that traditional broadcast receiver chip links to each other with conventional P VC among the figure, and other pin does not all omit and draws.
Traditional broadcast receiver chip is to adopt pure Realization of Analog Circuit, changes PVC and has just changed the resonance frequency of local oscillator and the frequency-selecting scope of antenna, thereby reach the effect in tuning different radio station, and this method has also been brought many drawbacks:
1) first is exactly that platform is out of tune;
2) analog circuit is because can not transfer precisely, and filter bandwidht cannot be done narrow, so to relatively poor with outer spuious inhibition ability;
3) PVC produces cumbersome;
4) need debugging except PVC on the broadcast receiver production line, also need voltage regulator/transformer and inductance to improve selecting frequency characteristic and coverage property.
Summary of the invention
In order to overcome the defective of prior art, the present invention proposes simple in structure, materials are few, handling ease, the two tunable capacitors of a kind of three ports of exempting to debug and manufacturing approach thereof.
The two tunable capacitors of a kind of novel three ports comprise moving plate portion, stator portion, dielectric layer; Said stator portion and moving plate portion form two electric capacity respectively, and said two electric capacity have a common port, and the non-common port of two electric capacity and common port form one three port devices; Dielectric layer is between said stator portion and said moving plate portion; Above-mentioned two electric capacity are simultaneously adjustable, and the equivalent in the opposite direction variation of the value of two electric capacity.
Preferably, said stator portion comprises some stator layers, and said stator layer comprises the stator of two correspondences, and the stator of said two correspondences is positioned at same plane.
Preferably, said stator layer also comprises dielectric-slab, and the stator of said two correspondences is arranged on the said dielectric-slab.
Preferably, said moving plate portion comprises screw rod and some moving plates, and said some moving plates are arranged on the differing heights of said screw rod; Said screw rod is arranged at the center of said stator portion, and through driving the moving plate rotation, reaches the appearance value that changes above-mentioned two electric capacity.
Preferably, the shortest rotatable 180 degree of said screw rod.
Preferably, said stator and moving plate are metal material.
The manufacturing approach of the two tunable capacitors of a kind of novel three ports, it comprises the following steps:
1) forms stator portion;
2) form moving plate portion;
3) stator portion and moving plate portion altogether according to certain order stack; And between stator portion and the moving plate portion dielectric layer is set.
Preferably, the method that forms stator portion is for forming some stator layers, and the method that forms the stator layer is for plating the metal of two correspondences on one deck dielectric-slab.
Preferably, this metallic area of stating two correspondences equates.
Preferably, the method that forms moving plate portion is for to be arranged at some moving plates on the differing heights of screw rod.
Compared with prior art, beneficial effect of the present invention is following:
Compared following differences with traditional P VC:
First; The present invention only comprises two electric capacity with common port; And the non-common port of two electric capacity and common port have constituted one three port devices, and the common port of two electric capacity connects a moving plate that rotates with screw rod, two stators of non-public termination of two electric capacity; Two stators of two electric capacity on same plane, when rotary screw, moving plate and wherein the overlapping area of a stator reduce and the overlapping area of another piece stator is equivalent increases, thereby realize that an electric capacity reduces, another electric capacity is equivalent to be increased.Compare with the structure of four big electric capacity of traditional tetrad PVC, the present invention is simple in structure, and materials are few, and processing is simple.
The second, traditional tetrad PVC is five-port (is respectively 1,2,3,4, G), and the two tunable capacitors of three ports of the present invention are merely three ports (be respectively 1,2, G), and simple in structure, it is also convenient to use.
The 3rd, the Vp of two tunable capacitors of three ports of the present invention and digital radio machine chip, Vn, Vin links to each other.Vp and Vn are two accurate voltages that produce in the chip, change as long as two electric capacity of inside of the present invention are equivalent in the opposite direction, then Vin will be between Vn and Vp linear change, the value of Vin and the absolute value of tunable capacitor have nothing to do.Can not influence use even electric capacity produced error when PVC produced so yet.And traditional tetrad PVC has the big electric capacity of four interlocks, leans on central screw rod to rotate and changes, and four electric capacity increase simultaneously during the screw rod rotation, so more superincumbent traditional P VC does not accomplish when joining traditional broadcast receiver.
The 4th, traditional tetrad PVC is except the big electric capacity of four interlocks, each big electric capacity all parallel connection a little electric capacity, finely tune through four small screws at the back side, and the two tunable capacitors of three ports of the present invention have saved these four little electric capacity and four adjusting screw(rod)s; Simple in structure, processing is got up easily.
The 5th, the two tunable capacitors of the present invention's three ports do not have harsh requirement to the maximum of two electric capacity, and traditional tetrad PVC requires each electric capacity that certain scope is arranged.
Description of drawings
Fig. 1 is traditional tetrad PVC front schematic view;
Fig. 2 is traditional tetrad PVC reverse side sketch map;
Fig. 3 is the sketch map that 1 end of traditional tetrad PVC is connected with stator;
Fig. 4 is the sketch map that the G end of traditional tetrad PVC is connected with moving plate;
Fig. 5 is the sketch map of traditional broadcast receiver chip collocation conventional P VC;
Fig. 6 is the basic implementation method sketch map of the two tunable capacitors of embodiment 1 the present invention three ports;
Fig. 7 is the compound mode sketch map of embodiment 1 moving plate portion of the present invention and stator portion;
Fig. 8 is that embodiment 1 stator of the present invention portion forms sketch map;
Fig. 9 is that embodiment 1 moving plate of the present invention portion forms sketch map;
Figure 10 is the manufacturing approach sketch map of the two tunable capacitors of embodiment 1 the present invention three ports;
Figure 11 is the front schematic view of the two tunable capacitors of embodiment 1 the present invention three ports;
Figure 12 is the schematic rear view of the two tunable capacitors of embodiment 1 the present invention three ports;
Figure 13 is the sketch map of the two tunable capacitors of embodiment 1 digital radio receiver collocation the present invention's three ports;
Figure 14 is the compound mode sketch map of embodiment 2 moving plate portions of the present invention and stator portion;
Figure 15 is the manufacturing approach sketch map of the two tunable capacitors of embodiment 2 the present invention three ports;
Figure 16 is the compound mode sketch map of embodiment 3 moving plate portions of the present invention and stator portion.
Embodiment
The below combines accompanying drawing and specific embodiment that the present invention is done further detailed description:
The two tunable capacitors of a kind of novel three ports comprise moving plate portion, stator portion, dielectric layer; Said stator portion and moving plate portion form two electric capacity respectively, and said two electric capacity have a common port, and the non-common port of two electric capacity and common port form one three port devices; Dielectric layer is between said stator portion and said moving plate portion; Above-mentioned two electric capacity are simultaneously adjustable, and the equivalent in the opposite direction variation of the value of two electric capacity.
Said stator portion comprises some stator layers, and said stator layer comprises the stator of two correspondences, and the stator of said two correspondences is positioned at same plane.
Said stator layer also comprises dielectric-slab, and the stator of said two correspondences is arranged on the said dielectric-slab.
Said moving plate portion comprises screw rod and some moving plates, and said some moving plates are arranged on the differing heights of said screw rod.Said screw rod is arranged at the center of said stator portion, and through driving the moving plate rotation, reaches the appearance value that changes above-mentioned two electric capacity.
Like Fig. 6, in the present embodiment, stator portion comprises a stator layer; This stator layer forms the stator layer by on a dielectric-slab, plating the metal that two areas equate, this states first stator 111, second stator 112 that metal pair that two areas equate is answered the stator layer.Moving plate portion comprises screw rod 55 and a moving plate 33, and moving plate 33 is fixed on the screw rod 55, and screw rod 55 is positioned at stator portion center.
Fig. 7 is the compound mode of present embodiment stator portion and moving plate portion.Wherein, moving plate 33 is at the upside of first stator 111 and second stator 112, promptly at the upside of stator layer 11; And be provided with dielectric layer 22 between moving plate and the stator layer.Here be merely for example, during practical implementation, moving plate 33 also can be at the downside of first stator 111 and second stator 112, i.e. the downside of stator layer 11, and the present invention does not make qualification to this.
In the present embodiment, there is a stator layer in stator portion, is merely for example, and during practical implementation, stator portion also can comprise a plurality of stator layers, and the present invention does not make qualification to this.
In the present embodiment, there is a moving plate in moving plate portion, is merely for example, and during practical implementation, stator portion also can comprise a plurality of stator layers, and the present invention does not make qualification to this.
In the present embodiment, stator and moving plate are metal material.Moving plate is a fan-shaped metal level.
Introduce the manufacturing approach of the two tunable capacitors of the present invention's three ports below:
1, forms stator portion; Promptly form the stator layer earlier, the method that the stator layer forms is following:
Like Fig. 8, on a dielectric-slab, plate the equal metal of area of two correspondences, these two metals are first stator 111 and second stator 112 of stator portion.These two metals connect the non-common port of the two tunable capacitors of three ports.And first stator 111 is provided with 1 terminal 130; Second stator 112 is provided with 2 terminals 140.
2, form moving plate portion, like Fig. 9, do the fan-shaped metal level of a slice, link to each other with screw rod 55, fan-shaped metal level is moving plate 33, and moving plate 33 rotates with screw rod 55.Fan-shaped metal level is connected through the common port of screw rod 55 with the two tunable capacitors of three ports.
3, according to certain order stack altogether stator portion and moving plate portion; And between stator portion and the moving plate portion dielectric layer is set.Referring to its concrete realization of Figure 10 as follows:
1) bottom is a stator layer 100, and that metal level arranged faces up; And first stator 111 is provided with 1 terminal 130; Second stator 112 is provided with 2 terminals 140; Mid portion is provided with G end 150.
2) in stator portion 100, press ground floor dielectric layer 200.
3) insert the screw rod 55 that has moving plate 33 in the center of stator layer 100, and screw rod 55 couples together with G end 150 and becomes common port.
Completion has been assembled in core of the present invention, and remaining is exactly the shell making (no longer describing here) of present embodiment of the present invention.
After making completion, having obtained like Figure 11 and described two figure of Figure 12 is the front and back sketch map of the two tunable capacitors of the present invention's three ports.Find out that from figure present embodiment is to having 3 terminal 1 ends, 2 ends and G end.Wherein, 1 end and G end, 2 ends and G end form two big capacitor C 1, C2 respectively.Screw rod 55 maximum rotatable 180 degree among Figure 12 in the middle of the front elevation.
Figure 13 is the sketch map of the two tunable capacitors of digital radio receiver collocation the present invention's three ports.Two capacitor C 1 that the present invention forms, C2 are with three port Vp of digital radio machine chip 600, Vn, and Vin connects, and its concrete annexation is: the common port of C1, C2 is that the G end is connected with Vin; The non-common port of C1 i.e. 1 end is connected with Vp; The non-common port of C2 i.e. 2 ends is connected with Vn.Wherein and the incoherent pin of the present invention do not draw.Because use of the present invention, huge variation has taken place in the radio station tuning methods of this chip, briefly is listed below:
1, at first the radio frequency output pin of FM has not needed; The tradition broadcast receiver is through Realization of Analog Circuit; And be super-heterodyne architecture, need radio-frequency filter that the FM frequency range is carried out frequency-selecting, and digital radio receiver is selected more accurate to frequency after adopting digital filter; Band is outer to suppress stronger, does not need radio-frequency filter fully;
2, secondly the local oscillator input pin of FM has not needed; The tradition broadcast receiver needs this pin to connect peripheral inductance and electric capacity; Change frequency of oscillation through changing electric capacity then; Digital radio receiver then passes through the capacitor array in the DSP module controls sheet chip, thereby reaches the effect that changes frequency of oscillation;
3, in like manner, the local oscillator input pin of AM has not needed yet;
Though 4, the antenna input pin of AM also exists, need not use peripheral tunable capacitor yet, but electric capacity is placed in the chip, the control of being carried out capacitor array by DSP reaches the effect that the AM antenna is imported frequency-selecting;
5, the radio station of digital radio machine chip is tuning is through Vp; Vn, these three ports of Vin connect PVC realization of the present invention, when PVC changes; Vin will change between Vn and Vp; Produce digital signal through ADC (analog-digital converter) back, the DSP module according to this digital signal just can know current broadcast receiver needs be tuned on which radio station, thereby send control signal to corresponding module.
According to shown in Figure 13, three port one ends of the present invention, 2 ends and G hold the Vp with the digital radio machine chip, Vn, and Vin links to each other.Vp and Vn are two accurate voltages that produce in the chip, change as long as two electric capacity of inside of the present invention are equivalent in the opposite direction, then Vin will be between Vn and Vp linear change, the value of Vin and the absolute value of tunable capacitor have nothing to do.Can not influence use even electric capacity produced error when the present invention produced so yet.This point traditional P VC does not accomplish when joining traditional broadcast receiver.
In the present embodiment, two stators on the stator layer have guaranteed this and have stated the isoplanar of two stators through being arranged on the same dielectric-slab.It is broadcast receiver to the band pointer scale require two electric capacity when using two blocks of stators on same plane; But actual add man-hour two blocks of stators can because a variety of causes not in one plane, thereby the decrease of an electric capacity recruitment and another electric capacity is variant when causing the moving plate rotation; When differing greatly, this capacitance applications the bigger phenomenon of scale deviation will occur to broadcast receiver.
The stator portion of present embodiment comprises two stator layers, and each stator layer has the structure identical with embodiment 1; Moving plate portion comprises screw rod and a moving plate.
Figure 14 is the compound mode of present embodiment stator portion and moving plate portion.Wherein, two stator layers 11 lay respectively at the upper and lower both sides of moving plate 33, and are provided with dielectric layer 22 between each stator layer 11 and the moving plate 33.This kind compound mode is than embodiment 1, can be under the situation that does not increase area the maximum of tunable capacitor be doubled, and plays certain fixation in addition, makes electric capacity steady in a long-term with the variation characteristic of screw rod rotation.The structure here is merely for example, and it also has other version, such as two moving plates and a stator portion can also be arranged, so the present invention does not make qualification to this.
The manufacturing approach of the two tunable capacitors of three ports that present embodiment is corresponding comprises the following steps:
Introduce the manufacturing approach of the two tunable capacitors of the present invention's three ports in the present embodiment below:
1, forms stator portion; Method such as embodiment 1.Here need make two stator layers.
2, form moving plate portion, method such as embodiment 1.
3, according to certain order stack altogether stator portion and moving plate portion; And between stator portion and the moving plate portion dielectric layer is set.Referring to its concrete realization of Figure 15 as follows:
1) bottom is first stator layer 300, and that metal level arranged faces up; And first stator 111 is provided with 1 terminal 105; Second stator 112 is provided with 2 terminals 106.
2) in ground floor stator portion 300, press ground floor dielectric layer 400.
3) insert the screw rod 55 have moving plate 33, and screw rod 55 is connected with the G end, becomes the common port of pair tunable capacitors.
4) press second layer dielectric layer 500.
5) the superiors are second stator portions 700, and that metal level arranged faces down.
The stator portion 300 of the bottom links to each other through the fixing metal screw 55 and the stator layer 700 of the superiors, and purpose is that electric capacity is doubled.Completion has been assembled in core of the present invention, and remaining is exactly that shell of the present invention is made (no longer describing) here.
The stator portion of present embodiment comprises a stator layer, and each stator layer has the structure identical with embodiment 1; Moving plate portion comprises screw rod and two moving plates.
Figure 16 is the compound mode of present embodiment stator portion and moving plate portion.Wherein, two moving plates 33 lay respectively at the upper and lower both sides of stator layer 11, and are provided with dielectric layer 22 between stator layer 11 and the moving plate 33.This kind compound mode is than embodiment 1, can be under the situation that does not increase area the maximum of tunable capacitor be doubled, and plays certain fixation in addition, makes electric capacity steady in a long-term with the variation characteristic of screw rod rotation.The structure here is merely for example, and it also has other version, such as two moving plates and a stator portion can also be arranged, so the present invention does not make qualification to this.
It repeats no more to corresponding method of manufacture should be arranged here.
The preferred embodiment of the present invention just is used for helping to set forth the present invention.Preferred embodiment does not have all details of detailed descriptionthe, does not limit this invention yet and is merely described embodiment.Obviously, according to the content of this specification, can do a lot of modifications and variation.These embodiment are chosen and specifically described to this specification, is in order to explain principle of the present invention and practical application better, thereby person skilled can be utilized the present invention well under making.The present invention only receives the restriction of claims and four corner and equivalent.
Claims (10)
1. the two tunable capacitors of novel three ports is characterized in that: comprise moving plate portion, stator portion, dielectric layer; Said stator portion and moving plate portion form two electric capacity respectively, and said two electric capacity have a common port, and the non-common port of two electric capacity and common port form one three port devices; Dielectric layer is between said stator portion and said moving plate portion; Above-mentioned two electric capacity are simultaneously adjustable, and the equivalent in the opposite direction variation of the value of two electric capacity.
2. the two tunable capacitors of a kind of novel three ports according to claim 1 is characterized in that: said stator portion comprises some stator layers, and said stator layer comprises the stator of two correspondences, and the stator of said two correspondences is positioned at same plane.
3. the two tunable capacitors of a kind of novel three ports according to claim 2, it is characterized in that: said stator layer also comprises dielectric-slab, and the stator of said two correspondences is arranged on the said dielectric-slab.
4. according to the two tunable capacitors of described a kind of novel three ports of claim 1, it is characterized in that: said moving plate portion comprises screw rod and some moving plates, and said some moving plates are arranged on the differing heights of said screw rod; Said screw rod is arranged at the center of said stator portion, and through driving the moving plate rotation, reaches the appearance value that changes above-mentioned two electric capacity.
5. the two tunable capacitors of a kind of novel three ports according to claim 4 is characterized in that, the shortest rotatable 180 degree of said screw rod.
6. according to claim 1 or the two tunable capacitors of 4 described a kind of novel three ports, it is characterized in that said stator and moving plate are metal material.
7. the manufacturing approach of the two tunable capacitors of novel three ports is characterized in that it comprises the following steps:
1) forms stator portion;
2) form moving plate portion;
3) stator portion and moving plate portion altogether according to certain order stack; And between stator portion and the moving plate portion dielectric layer is set.
8. the manufacturing approach of the two tunable capacitors of a kind of novel three ports according to claim 6 is characterized in that, the method that forms stator portion is for forming some stator layers, and the method that forms the stator layer is for plating the metal of two correspondences on one deck dielectric-slab.
9. the manufacturing approach of the two tunable capacitors of a kind of novel three ports according to claim 7 is characterized in that, this metallic area of stating two correspondences equates.
10. the manufacturing approach of the two tunable capacitors of a kind of novel three ports according to claim 6 is characterized in that the method that forms moving plate portion is for to be arranged at some moving plates on the differing heights of screw rod.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110007878.4A CN102646512B (en) | 2011-01-14 | 2011-01-14 | Novel three-port dual-adjustable capacitor and manufacture method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110007878.4A CN102646512B (en) | 2011-01-14 | 2011-01-14 | Novel three-port dual-adjustable capacitor and manufacture method thereof |
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| CN102646512A true CN102646512A (en) | 2012-08-22 |
| CN102646512B CN102646512B (en) | 2015-03-25 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH639509A5 (en) * | 1981-02-03 | 1983-11-15 | Far Fab Assortiments Reunies | Adjustable capacitor and method of manufacturing a series of such adjustable capacitors |
| CN1191377A (en) * | 1997-02-19 | 1998-08-26 | 株式会社村田制作所 | Varirable capacitor and LC composite part using same |
| JPH10312935A (en) * | 1997-05-09 | 1998-11-24 | Mitsubishi Materials Corp | Variable capacitor |
| JPH1167589A (en) * | 1997-08-13 | 1999-03-09 | Chichibu Onoda Cement Corp | Variable capacitor |
| CN202025653U (en) * | 2011-01-14 | 2011-11-02 | 问石科技有限公司 | Novel three-interface double-adjustment capacitor |
-
2011
- 2011-01-14 CN CN201110007878.4A patent/CN102646512B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH639509A5 (en) * | 1981-02-03 | 1983-11-15 | Far Fab Assortiments Reunies | Adjustable capacitor and method of manufacturing a series of such adjustable capacitors |
| CN1191377A (en) * | 1997-02-19 | 1998-08-26 | 株式会社村田制作所 | Varirable capacitor and LC composite part using same |
| JPH10312935A (en) * | 1997-05-09 | 1998-11-24 | Mitsubishi Materials Corp | Variable capacitor |
| JPH1167589A (en) * | 1997-08-13 | 1999-03-09 | Chichibu Onoda Cement Corp | Variable capacitor |
| CN202025653U (en) * | 2011-01-14 | 2011-11-02 | 问石科技有限公司 | Novel three-interface double-adjustment capacitor |
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| CN102646512B (en) | 2015-03-25 |
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Granted publication date: 20150325 Termination date: 20170114 |